#!/bin/bash
your_name="runoob"
#使用双引号拼接
greeting="hello,"$your_name"!"
greeting_1="hello,${your_name}!"
echo $greeting $greeting_1

#使用单引号拼接
greeting_2='hello, '$your_name'!'
greeting_3='hello, ${your_name} !'
echo $greeting_2 $greeting_3
